By-products of nitrogen metabolism are elevated in high concentration in urine compared to blood, and serve as a surrogate marker for the identification of urine leakage into a body compartment. This may occur due to trauma, abdominal or pelvic surgery, and bladder perforation. Concentrations of creatinine or urea nitrogen that exceed the concentration found in a concurrent sample of blood are suggestive of the presence of urine.
No special preparation is needed for Creatinine Aspirated Body Fluid. Inform your doctor if you are on any medications or have any underlying medical conditions or allergies before undergoing Creatinine Aspirated Body Fluid. Your doctor depending on your condition will give specific instructions.
| Gender | Age groups | Value |
| UNISEX | All age groups | body fluid to serum ratio > 1 suggestpresence of urine in the sample |